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| author | Richard Guenther <rguenther@suse.de> | 2007-10-19 15:36:05 +0000 |
|---|---|---|
| committer | Richard Biener <rguenth@gcc.gnu.org> | 2007-10-19 15:36:05 +0000 |
| commit | 36784d0e879801c081910ea958839797f5f9bb48 (patch) | |
| tree | 9af82af05ff6db994ce02d04b87bc63d05a986ad /gcc/alias.c | |
| parent | 77aadb572826ca8b23ea61ab6ce186f9af1cbe08 (diff) | |
| download | gcc-36784d0e879801c081910ea958839797f5f9bb48.zip gcc-36784d0e879801c081910ea958839797f5f9bb48.tar.gz gcc-36784d0e879801c081910ea958839797f5f9bb48.tar.bz2 | |
re PR middle-end/33816 (gimplification before build_array_type re-set alias set of arrays to zero)
2007-10-19 Richard Guenther <rguenther@suse.de>
PR middle-end/33816
PR middle-end/32921
* stor-layout.c (layout_type): Assert that aggregates do not
have their alias sets set.
* alias.c (get_alias_set): Return alias set zero for incomplete
types, return the alias set of the element for incomplete array
types, but do not remember these.
* gfortran.dg/pr32921.f: New testcase.
From-SVN: r129491
Diffstat (limited to 'gcc/alias.c')
| -rw-r--r-- | gcc/alias.c | 12 |
1 files changed, 12 insertions, 0 deletions
diff --git a/gcc/alias.c b/gcc/alias.c index 1ba1ce3..6bf67f3 100644 --- a/gcc/alias.c +++ b/gcc/alias.c @@ -611,6 +611,18 @@ get_alias_set (tree t) if (TYPE_ALIAS_SET_KNOWN_P (t)) return TYPE_ALIAS_SET (t); + /* We don't want to set TYPE_ALIAS_SET for incomplete types. */ + if (!COMPLETE_TYPE_P (t)) + { + /* For arrays with unknown size the conservative answer is the + alias set of the element type. */ + if (TREE_CODE (t) == ARRAY_TYPE) + return get_alias_set (TREE_TYPE (t)); + + /* But return zero as a conservative answer for incomplete types. */ + return 0; + } + /* See if the language has special handling for this type. */ set = lang_hooks.get_alias_set (t); if (set != -1) |